Self-measuring pump.



J. J. TOKHEIM.

SELI MEASURING PUMP. APPLIOATIOH FILED my gs, 1907.

Patented Dec.22,1908.

' UNEED T E b P fidli l ll i JO'EN .T. TOKHEIM, or CEDAR RAPIDS, ionii, ASSIGNOR TO THE TOKHEIM MANUFACTURING co, or CEDAR RAPIDS, IOWA.

SELFMEASURING PUMP.

Specification of Letters Patent.

Patented Dec. 22, 1908.

Application filed lday 29, 1907. Serial N 0. 376,32&.

To all whom it may concern:

Be it known that 1, JOHN J. 'loKnEiM, e.

' citizen of the United States, residing at Cedar in the gasolcne, which accumulate in the storage tank and are. drawn into the pump and settle on the ulre seats, it is practically impossible to nn ininin. a. constant priming in the pump, an incident that frequently re.- sults in troublesome and annoying delays to the prospective purclmscr; thnt no provision is made to prevent such contingency or toolloiv onsy and rapid restoration of the. valves to proper action and the ready removal of extraneous nnittcr from the pump: that the venting of the dispensing reservoir is not suilicicntly delicnte; and (but no adequate arrangement is employed to return all of the.

unusedgusolcnc to the storage tank without the escape of fumes. Of course it is known that moons for obviating [no of the shore objections are to be found in separate :ippurutus, :is for cxumplc, in the patent granted to myself and l). U. Muns'lield for u measur ing pump, dated February .17, 1903, and numbered 720,638, in which there is shown an apparatus embodying means for mechnniczilly measuring dclinite quantities of gusolcne and for returning the unused portion to tho storuge tank; but this appliance is lacking in any nicunsl'or nniintuining n positive priming under all conditions of use and for preventing passage of extraneous matter to the pump. Again, in u patent granted to myself for an oil tnnh, dntcdkluly 2%, i006, and numbered 826,912, there is shown an appurnl us embodying means for precluding en truncoof extraneous imitter to the pump and also menus for retuining all of the. unused gusolcnc to the storage tank; but this upplionce is In hing in the. means for nmininining ilconslunt priming in the pump cylinder.

The object of the present invention is, therefore in a simple, practical and positive manner end-in a single n-ppnrutus, to provide means to maintain constant priming, to preclude entrance of extraneous matter to the pump, to efi'ect sa ing of all of the unused gasolene, to secure novel venting of the dispensing reservoir, and to permit the ready removal of matter drawn from the storage tank to the pump without interfering with the valves of the latter.

With the above and other objects in View, as will appear as the nature of the invention is better understood, the some consists in the novel construction and combination of parts of a combined priming chamber and sediment trep for pumps, as Will be'hereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification and in which like characters of reference indicate correspond ing parts;-the figure represents a longitin' dinal sectional View of a combined priming chamber and sediment trsp constructed in accordance with my invention.

Referring to the drawings 8 indicates the combined priming chamber and sediment trap having it pipe 9 communicating with the interior of the trap ot the upper end thereof and lending to a tank or other source of gusolcnc supply (not shown). In addition to performing toe function of e priming chamber and sediment trap, the member 8 also forms the lower cap for the pump cyl indcr 10 which may be of the usual or any preferred construction and carries at its upper end :1 cup 11 with which is connected the outlet pipe 12.

if desired, a plurality of pipes 9 may be connected with the trap so one uimp may draw gnsolcnc from a. number of tanks by providing the different pipes with valves 9 to close or open them. i

The trap is provided near its upper end with a partition l3 that is ccntrully orificed and thrcade d to receive the external threads of :1v sleeve 14, the interior of which is threaded and is engaged by an inlet pipe 15 that extends to a. point near the bottom of the trap and carries it screen 16. This pipe 15 is provided near its upper end. or adjacent to the partition 13 with u non-siphoning orifice Hi, which, us will appear later on operates positively to prevent the trap from being cmpt icd of gusolenc, whereby a constant supply for priming is always resent. Morei v T e term sedim ent is herein employed generically to include dirt or foreign matter of any character present in the gasolene that will tend to clog the pump valves or otherwise detract from the proper operation of the apparatus.

he periphery of the upper portion of the sleeve 14 is threaded andlengaged by an annulus 18 forming the base of the cage 19 that is 0 erated to hold in proper position a weig ted valve 20 that normall closes the upper end of the inlet pipe 15." his valve is provided with an arm 20 that extends sli htly above the upper face of the ca e and is designed to be en aged by the lower ace of the piston 21 with w 'ch is connected a pump rod 22 of any ap roved construction.

I The iston em odies a six armed cage 23,

' with w 'ch the ump rod is connected and which serves to ouse an upwardly opening valve 24 that is provided with a downwardly projected boss or teat 25 designed to engage a stud or lug 26 on the upper face of the valve 20.

'lhe obiect of the arm 20 and extension 25 is to cause the ,unseating of the two valves, whereby that gasolene remaining in the pump cylinder and pipes after the pump has con operated to elevate the charge will be permitted to pass back throu'ghthe trap and thus lear e the priming for a succeeding operation. J

in the operation of the device, when the 1f duringthe operation of the pump any extraneous matter be drawn through the pipes 9 into the trapiitiwill be revented by the strainer 16 from entering t e inlet pipe, and after a period, which maybe determined by observation or otherwise, the plug" 7 will be removed and thesediment-cleane from the cap. At the conclusion of the pumping operation, when the piston is moved downward the valves 20 and 24 will be tripped by the mechanism described and the gasolenein the pumping system will pass back into the tank throughthe cylinder 10 the primer 8 and pipe 9, but as soon as the level of the gasolene passes below the openin 16 any siphonin action will be preclude so that there wi always be suflicient gasolene or liquid within the trap to insure the proper priming of the pum What is claimed is Thecombination with a pump, of a'combined priming chamberand sediment trap provided at-its lower'end with a clean out plug, a partition secured within the trap near its upper end, a pipe depending from the partition and provided near its upper end with non-siphoning opening and at its lower end with a screen, a trip valve su ported by-the partition and arranged over t e upper end of the pipe for controlling assage therethrough, and a supply pipe'disc arging into the trap below the non-s1 honing opening.

In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature. in the presence of two witnesses.

JOHN J. TOKHEIM.

Witnesses L. M. KRAIZ, O. J. FELToN. 

